# validatehtml MCP server

> Validates HTML, CSS, JSON, XML, and WCAG accessibility compliance for local files or live URLs.

- Repository: https://github.com/theodcrx/validatehtml-cli
- Page: https://hostedmcp.org/servers/theodcrx/validatehtml-cli
- Transport: stdio
- Stars: 0
- License: MIT
- Latest version: 0.1.0

## Install

### Claude Code

```sh
claude mcp add --env VALIDATEHTML_API_KEY=<YOUR_VALIDATEHTML_API_KEY> validatehtml-cli -- npx -y validatehtml
```

### Cursor (`~/.cursor/mcp.json`)

```json
{
  "mcpServers": {
    "validatehtml-cli": {
      "command": "npx",
      "args": [
        "-y",
        "validatehtml"
      ],
      "env": {
        "VALIDATEHTML_API_KEY": "<YOUR_VALIDATEHTML_API_KEY>"
      }
    }
  }
}
```

### VS Code (`.vscode/mcp.json`)

```json
{
  "servers": {
    "validatehtml-cli": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "validatehtml"
      ],
      "env": {
        "VALIDATEHTML_API_KEY": "<YOUR_VALIDATEHTML_API_KEY>"
      }
    }
  }
}
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "validatehtml-cli": {
      "command": "npx",
      "args": [
        "-y",
        "validatehtml"
      ],
      "env": {
        "VALIDATEHTML_API_KEY": "<YOUR_VALIDATEHTML_API_KEY>"
      }
    }
  }
}
```

### Codex (`~/.codex/config.toml`)

```toml
[mcp_servers.validatehtml-cli]
command = "npx"
args = ["-y", "validatehtml"]

[mcp_servers.validatehtml-cli.env]
VALIDATEHTML_API_KEY = "<YOUR_VALIDATEHTML_API_KEY>"
```

### Gemini CLI (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "validatehtml-cli": {
      "command": "npx",
      "args": [
        "-y",
        "validatehtml"
      ],
      "env": {
        "VALIDATEHTML_API_KEY": "<YOUR_VALIDATEHTML_API_KEY>"
      }
    }
  }
}
```

## Environment variables

| Name | Required | Secret | Description |
|---|---|---|---|
| `VALIDATEHTML_API_KEY` | no | yes | Optional. Only audit_page needs it. 100 free calls a month. |

## FAQ

### What files can be validated?

The tool can read .html, .htm, .css, .json, .xml, and .svg files up to 1 MB.

### Is my code stored on your servers?

Code is checked in memory and is not stored.